Front portion of truck



FIG. 1 is a perspective view of a front portion of truck;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is an enlarged front view thereof.

The motor vehicle shown in broken lines is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a front portion of truck, as shown and described. 